Method, user terminal and network side equipment for improving network resource occupancy

ABSTRACT

A method, a user terminal and a network side equipment for improving network resource occupation are disclosed. A dormancy timer is set for the user terminal and a time threshold of the dormancy timer is adjusted dynamically by monitoring a resource occupation rate of the communication system, where time threshold of the dormancy timer is inversely proportional to the resource occupation rate. In this way, relatively longer time threshold of the dormancy timer may be set when a system occupation rate is low, so as to improve user experience; and relatively shorter time threshold of the dormancy timer may be set when the system occupation rate is high, so as to provide a higher capacity and provide services for more user terminals.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of application Ser. No. 13/547,069,filed on Jul. 12, 2012 which is a continuation of International PatentApplication No. PCT/CN2011/070284 filed on Jan. 14, 2011. TheInternational Patent Application claims priority to Chinese PatentApplication No. 201010002267.6, filed on Jan. 14, 2010. Both of theaforementioned patent applications are hereby incorporated by referencein their entirety.

TECHNICAL FIELD

The present application relates to the field of communicationtechnologies, and in particular, to a method, a user terminal and anetwork side equipment for improving network occupancy through adormancy timer.

BACKGROUND

In a communication network system, to prevent a user terminal, which hasno data to transmit, from needlessly occupying a network resource, amechanism called a “dormancy timer” is introduced. By using thismechanism, whenever a user terminal establishes a connection with anetwork side equipment, the system establishes a timer for the userterminal, and this timer is called the “dormancy timer”. When the userterminal no longer has data to transmit, the dormancy timer starts tocount time. If the user terminal has no data to transmit before thedormancy timer expires at a time threshold, the system actively releasesthe connection with the user terminal and reclaims the occupiedresource, thus improving a cyclic utilization rate of limited resourcesin the system. If the user terminal begins to transmit data before thedormancy timer expires, the dormancy timer is reset and restarted afterthe user terminal stops to transmit data again.

In the communication network system, if the time threshold of thedormancy timer is set too low, that is, the dormancy timer expires aftera short time, although the network resources of the system may be saved,instances of unnecessary removal or establishment of air interfaceconnections may increase, generating an extra load on a signalingprocessing unit. Frequent removals or establishments of the connectionsto the user terminal may negatively impact user experience. On the otherhand, if the time threshold of the dormancy timer is set too high,limited network resources are unnecessarily occupied by connected userterminals for too long, so that the system cannot reclaim theseresources in time. Newly accessing user terminals cannot be allocatedwith the resources soon enough to establish connections, resulting in areduced capacity of the system.

SUMMARY

Embodiments of the present invention provide a method, a user terminaland a network side equipment for improving network resource occupancythrough controlling a dormancy timer. The technical solutions aredescribed as follows.

In one aspect, a method for improving network resource occupancy in acommunication system is provided, which includes: obtaining, by anetwork side equipment of the communication system, a resourceoccupation rate of the communication system; determining, by the networkside equipment, a time threshold of a dormancy timer according to theobtained resource occupation rate of the communication system; setting,by the network side equipment, the dormancy timer for a user terminalwhich has a connection with the network side equipment, wherein thedormancy timer starts when the user terminal stops transmitting data andexpires when it reaches the time threshold; and when the dormancy timerexpires, releasing, by the network side equipment, the connection withthe user terminal.

The time threshold of the dormancy timer is inversely proportional tothe resource occupation rate.

In another aspect, a network side equipment of a communication systemincluding a receiver, a transmitter, a processor and a memory storinginstructions executable by the processor is provided, where theprocessor is configured to: obtain a resource occupation rate of thecommunication system; determine a time threshold of a dormancy timeraccording to the obtained resource occupation rate of the communicationsystem; set the dormancy timer for a user terminal which has aconnection with the network side equipment, wherein the dormancy timerstarts when the user terminal stops transmitting data and the dormancytimer expires when it reaches the time threshold; and when the dormancytimer expires, release the connection with the user terminal.

The time threshold of the dormancy timer is inversely proportional tothe resource occupation rate.

In yet another aspect, a user terminal having a connection with anetwork side equipment in a communication system is provided, whichincludes: a receiver, configured to receive from the network sideequipment a time threshold reset command with a resource occupation rateof the communication system; and a processor, configured to determine atime threshold of a dormancy timer according to the resource occupationrate of the communication system and release the connection with thenetwork side equipment when the dormancy timer expires.

The dormancy timer starts when the user terminal stops transmitting dataand expires when it reaches the time threshold. The time threshold ofthe dormancy timer is inversely proportional to the resource occupationrate.

In the present invention, the time threshold of the dormancy timer isadjusted dynamically by monitoring the resource occupation rate of thecommunication system. In one instance, the time threshold of thedormancy timer is inversely proportional to the resource occupationrate. In this way, dormancy time of the user terminals in thecommunication system may be adjusted flexibly, so that the communicationsystem may provide better services to the user terminals. Unnecessarysystem overhead may be prevented, and system capacities may be utilizedmore efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart of a method for improving network resourceoccupancy according to a first embodiment of the present invention;

FIG. 2 is a flow chart of a method for improving network resourceoccupancy according to a second embodiment of the present invention;

FIG. 3 is a plot of a corresponding function between a resourceoccupation rate of a communication system and a time threshold of adormancy timer according to an embodiment of the present invention;

FIG. 4 is a plot of an example of the corresponding function in FIG. 3;

FIG. 5 is a plot of another example of the corresponding function inFIG. 3;

FIG. 6 is a block diagram of an apparatus for improving network resourceoccupancy according to a third embodiment of the present invention;

FIG. 7 is a block diagram of an apparatus for improving network resourceoccupancy according to a fourth embodiment of the present invention; and

FIG. 8 is a block diagram of a communication system according to a fifthembodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make the technical solutions, objectives and merits of the presentinvention clearer, the embodiments of the present invention aredescribed in detail in the following with reference to the accompanyingdrawings.

Embodiment 1

Referring to FIG. 1, a method for improving network resource occupancyis provided in a first embodiment of the present invention. The methodincludes the following:

Step 101: A resource occupation rate of a communication system isobtained.

Step 102: A time threshold of the dormancy timer is determined accordingto the resource occupation rate of the communication system, where thetime threshold of the dormancy timer is inversely proportional to theresource occupation rate.

An adjustment to the time threshold may be performed as following: Ifthe resource occupation rate increases or reaches a first threshold, thetime threshold is lowered; and if the resource occupation rate decreasesor reaches a second threshold, the time threshold is increased.

In this embodiment, through monitoring the resource occupation rate ofthe communication system, the time threshold of the dormancy timer isadjusted dynamically according to an inversely proportional relationbetween the resource occupation rate and the time threshold of thedormancy timer. In this way, dormancy time, which applies to userterminals of the communication system, may be adjusted flexibly, so thatthe communication system may provide better services. Furthermore, thedormancy timer is adjusted according to the resource occupation rate ofthe communication system, so that an unnecessary system overhead may beprevented, and system capacity may be improved.

Embodiment 2

Referring to FIG. 2, a method for controlling a dormancy timer isprovided in a second embodiment. The method includes:

Step 201: A current resource occupation rate of a communication systemis obtained.

Step 202: A time threshold corresponding to the current resourceoccupation rate of the system is obtained according to a correspondingfunction between the resource occupation rate of the communicationsystem and the time threshold. The dormancy timer is set according tothe obtained time threshold, where the time threshold of the dormancytimer is inversely proportional to the resource occupation rate.

In this way, the time threshold may be adjusted according to thecorresponding function, so as to facilitate future maintenance and dataupdating. For example, during the data updating, the correspondingfunction may be adjusted accordingly.

Besides the corresponding function, the relation between the resourceoccupation rate of the communication system and the time threshold mayalso be set in other manners, for example, in a form of a correspondingrelation table. The corresponding function adopted in this embodiment ofthe present invention is merely taken as an example, and this embodimentof the present invention is not limited herein.

A plot of the corresponding function between the resource occupationrate and the time threshold is shown in FIG. 3. The correspondingfunction is specifically expressed as:

DORMANCY_TIMER_VALUE=f (RES_OCUPY, RES_MAX),

In the corresponding function, the time threshold is changed with thechange of the resource occupation rate. As shown in FIG. 3, the verticalcoordinate represents the time threshold, the horizontal coordinaterepresents the resource occupation rate, where DORMANCY_(—) TIMER_VALUEis a current value of the time threshold of the dormancy timer,RES_OCUPY is a current value of the resource occupation rate of thesystem, and RES_MAX is a maximum resource occupation rate of the system.

According to the corresponding function, each value of the timethreshold corresponding to each value of the resource occupation ratemay be obtained. Through this manner, corresponding time threshold maybe calculated rapidly according to the corresponding function, thussaving a system overhead.

The function shown in FIG. 3 may specifically be embodied as following:

As shown in FIG. 4, the time threshold of the dormancy timer is aconstant corresponding to each region of the resource occupation rate.Alternatively, as shown in FIG. 5, the time threshold of the dormancytimer is a constant corresponding to two end regions of the resourceoccupation rate, and is a variable corresponding to a middle region ofthe resource occupation rate. The time threshold is decreased as theresource occupation rate increases.

A plot of a corresponding function is shown in FIG. 4. The function maybe specifically expressed as:

${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{t\; 2} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $

where

TH1 is a first threshold of the resource occupation rate, TH2 is asecond threshold of the resource occupation rate, and TH1<TH2<RES_MAX.

The time threshold, expressed in the above formula as theDORMANCY_TIMER_VALUE, has three predetermined values, t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, and t3 is a third predetermined value ofthe time threshold, and t1>t2>t3.

A value range of the resource occupation rate is separated into threesegments by the first threshold and the second threshold. When theresource occupation rate is greater than TH2, which is considered to bein a “heavy” interval of the value range, the dormancy timer of a userterminal of the communication system adopts a smaller value t3 (forexample, 5 seconds). When the resource occupation rate is greater thanTH1 and smaller than or equals to TH2, which is considered to be in a“middle” interval of the value range, the dormancy timer adopts a littlegreater value t2 (for example, 10 seconds). When the resource occupationrate is smaller than TH1, which is considered to be in a “light”interval of the value range, the dormancy timer adopts a much greatervalue t1 (for example, 30 seconds).

By adopting the time threshold in the manner shown above, frequentadjustments to the time threshold may be prevented, thus reducing thesystem overhead.

Another plot of a corresponding function is shown in FIG. 5. Thefunction may be specifically expressed as:

${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{{RES\_ OCUPY}/} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{{( {{{TH}\; 2} - {{TH}\; 1}} )*t\; 2} - {t\; 1}} & \; \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $

where, in the preceding formula, TH1 is a first threshold of theresource occupation rate, TH2 is a second threshold of the resourceoccupation rate, and TH1<TH2<RES_MAX;

The time threshold, expressed in the above formula as the DORMANCY_(—)TIMER_(—) VALUE, has three predetermined values, t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.

A value range of the resource occupation rate is separated into threesegments by the first threshold and the second threshold. When theresource occupation rate is greater than TH2, which is considered to bein a “heavy” interval of the value range, the dormancy timer of a userterminal of the communication system adopts a smaller value t3 (forexample, 5 seconds). When the resource occupation rate is greater thanTH1 and smaller or equals to TH2, which is considered to be in a“middle” interval of the value range, the dormancy timer adopts a valuethat is equal to (RES_OCUPY-TH1)/(TH2−TH1)*25+5. When the resourceoccupation rate is smaller than TH1, which is considered to be in a“light” interval of the value range, the dormancy timer adopts a greatervalue t1 (for example, 30 seconds).

By adopting the time threshold in the manner shown above, the timethreshold of the system may be controlled more accurately, so as toachieve a more accurate control effect.

The function plots shown in FIG. 4 and FIG. 5 are merely specificimplementation manners of the function plot shown in FIG. 3. Which kindof function is adopted may be determined according to specific usage.This embodiment of the present invention is not limited herein.

Embodiment 3

Referring to FIG. 6, an apparatus for controlling a dormancy timerprovided in a third embodiment of the present invention includes:

a state monitoring module 1, configured to monitor a resource occupationrate of a communication system; and

an adjusting module 2, configured to adjust time threshold of thedormancy timer according to the resource occupation rate of thecommunication system, where the time threshold of the dormancy timer isinversely proportional to the resource occupation rate.

The adjustment of the time threshold may be as following: If theresource occupation rate increases or reaches a threshold, the timethreshold is decreased. If the resource occupation rate decreases ordecreases to a threshold, the time threshold is increased.

In this embodiment of the present invention, through monitoring theresource occupation rate of the communication system, the dormancy timeris adjusted dynamically according to an inversely proportional relationbetween the resource occupation rate and the time threshold of thedormancy timer. In this way, dormancy time of the communication systemmay be adjusted flexibly, so that the communication system may providebetter services. Furthermore, the dormancy timer is adjusted accordingto the resource occupation rate of the communication system, so that anunnecessary system overhead may be prevented, and system capacities maybe utilized more efficiently.

Embodiment 4

As shown in FIG. 7, a fourth embodiment of the present inventionprovides an apparatus for controlling a dormancy timer. That is, theadjusting module 2 in Embodiment 3 may include a first determining unit3. As shown in FIG. 7, the apparatus includes:

a state monitoring module 1, configured to monitor a resource occupationrate of a communication system.

a first determining unit 3, configured to determine a time thresholdcorresponding to the resource occupation rate of the system according toa corresponding function between the resource occupation rate of thecommunication system and the time threshold, where the time threshold ofthe dormancy timer is inversely proportional to the resource occupationrate.

In this way, the time threshold may be adjusted according to thecorresponding function, so as to facilitate a future maintenance and adata updating. For example, during updating, the corresponding functionmay be adjusted accordingly. The value of the time threshold may beadjusted during the runtime of the system. Besides the function, therelation between the resource occupation rate of the communicationsystem and the time threshold may also be set in other manners, forexample, in a form of a corresponding relation table. The correspondingfunction adopted in this embodiment of the present invention is merelytaken as an example, and this embodiment of the present invention is notlimited herein.

A plot of the corresponding function between the resource occupationrate and the time threshold may be shown in FIG. 3. The correspondingfunction is specifically expressed as:

DORMANCY_TIMER_VALUE=f (RES_OCUPY, RES_MAX),

In the corresponding function, the time threshold is changed with thechange of the resource occupation rate. As shown in FIG. 3, the verticalcoordinate represents the time threshold, the horizontal coordinaterepresents the resource occupation rate, where DORMANCY_TIMER_(—) VALUEis a current value of the time threshold of the dormancy timer,RES_OCUPY is a current value of the resource occupation rate of thesystem, and RES_MAX is a maximum resource occupation rate of the system.

According to the corresponding function, each value of the timethreshold corresponding to each value of the resource occupation ratemay be obtained. Through this manner, corresponding time threshold maybe calculated rapidly according to the corresponding function, thussaving a system overhead.

The preceding function may specifically be embodied as following:

As shown in FIG. 4, the time threshold of the dormancy timer is aconstant corresponding to each region of the resource occupation rate.Alternatively, as shown in FIG. 5, the time threshold of the dormancytimer is a constant corresponding to two end regions of the resourceoccupation rate, and is a variable corresponding to a middle region ofthe resource occupation rate. The time threshold is decreased as theresource occupation rate increases.

A plot of a corresponding function is shown in FIG. 4. The function maybe specifically expressed as:

${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{t\; 2} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $

where

TH1 is a first threshold of the resource occupation rate, TH2 is asecond threshold of the resource occupation rate, and TH1<TH2<RES_MAX;

The time threshold, expressed in the above formula as theDORMANCY_TIMER_VALUE, has three predetermined values, t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, and t3 is a third predetermined value ofthe time threshold, and t1>t2>t3.

A value range of the resource occupation rate is separated into threesegments by the first threshold and the second threshold. When theresource occupation rate is greater than TH2, which is considered to bein a “heavy” interval of the value range, the dormancy timer of a userterminal of the communication system adopts a smaller value t3 (forexample, 5 seconds). When the resource occupation rate is greater thanTH1 and smaller than or equals to TH2, which is considered to be in a“middle” interval of the value range, the dormancy timer adopts a littlegreater value t2 (for example, 10 seconds). When the resource occupationrate is smaller than TH1, which is considered to be in a “light”interval of the value range, the dormancy timer adopts a much greatervalue t1 (for example, 30 seconds).

By adopting the time threshold in the manner shown above, frequentadjustments to the time threshold may be prevented, thus reducing thesystem overhead.

Another plot of a corresponding function is shown in FIG. 5. Thefunction may be specifically expressed as:

${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{{RES\_ OCUPY}/} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{{( {{{TH}\; 2} - {{TH}\; 1}} )*t\; 2} - {t\; 1}} & \; \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $

where, in the preceding formula, TH1 is a first threshold of theresource occupation rate, TH2 is a second threshold of the resourceoccupation rate, and TH1<TH2<RES_MAX;

The time threshold, expressed in the above formula as theDORMANCY_TIMER_VALUE, has three predetermined values, t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, and t3 is a third predetermined value ofthe time threshold, and t1>t2>t3.

A value range of the resource occupation rate is separated into threesegments by the first threshold and the second threshold. When theresource occupation rate is greater than TH2, which is considered to bein a “heavy” interval of the value range, the dormancy timer of a userterminal of the communication system adopts a smaller value t3 (forexample, 5 seconds). When the resource occupation rate is greater thanTH1 and smaller or equals to TH2, which is considered to be in a“middle” interval of the value range, the dormancy timer adopts a valuethat is equal to (RES_OCUPY-TH1)/(TH2−TH1)*25+5. When the resourceoccupation rate is smaller than TH1, which is considered to be in a“light” interval of the value range, the dormancy timer adopts a greatervalue t1 (for example, 30 seconds).

By adopting the time threshold in the manner shown above, the timethreshold of the system may be controlled more accurately, so as toachieve a more accurate control effect.

The function plots shown in FIG. 4 and FIG. 5 are merely specificimplementation manners of the function plot shown in FIG. 3. Which kindof function is adopted may be determined according to specific usage.This embodiment of the present invention is not limited herein.

Embodiment 5

Referring to FIG. 8, a communication system provided in a fifthembodiment of the present invention includes a network side equipment 3and a user terminal 4 (e.g. a mobile terminal). The user terminal 4 isconnected to the network side equipment 3 and is configured to performdata transmission. The communication system includes a dormancy timer 5set at the network side equipment 3 and/or inside the user terminal 4,and specifically includes:

a state monitoring module 1, configured to monitor a resource occupationrate of the communication system; and

an adjusting module 2, configured to adjust time threshold of thedormancy timer according to the resource occupation rate of thecommunication system, where the time threshold of the dormancy timer isinversely proportional to the resource occupation rate.

In this embodiment, through monitoring the resource occupation rate ofthe communication system, the dormancy timer is adjusted dynamicallyaccording to an inversely proportional relation between the resourceoccupation rate and the time threshold of the dormancy timer. In thisway, dormancy time of the communication system may be adjusted flexibly,so that the communication system may provide better services, so that anunnecessary system overhead may be prevented, and decrease of a systemcapacity may also be prevented.

The dormancy timer 5 may be set at the network side equipment 3 and/orinside the user terminal 4. The state monitoring module 1 and theadjusting module 2 may be independent to the dormancy timer, or may beset inside the dormancy timer.

For the state monitoring module 1 and the adjusting module 2, referencemay be made to Embodiment 3 or Embodiment 4.

For each preceding embodiment, the dormancy timer may be set at thenetwork side equipment and/or a user terminal side. In this way, whenthe dormancy timer reaches the time threshold, the network sideequipment may be actively disconnected with the user terminal so as torelease occupied resources. The user terminal may also be activelydisconnected with the network side equipment so as to release theoccupied resources.

The state monitoring module 1 may be set at the network side equipment.In this way, the network side equipment may monitor the resourceoccupation rate of the communication system. The adjusting module 2 maybe set at the network side equipment and/or the user terminal side.Either the network side equipment or the user terminal side may initiatean operation of adjusting the dormancy timer dynamically according tothe resource occupation rate of the communication system. The dormancytimer may be set at the network side equipment, or at the user terminalside, or at both the network side equipment and the user terminal side.The dormancy timer may be adjusted by sending a time threshold resetcommand through the network. The network side equipment may be a basestation. It can be seen that, the communication system provided in thisembodiment of the present invention includes the state monitoring module1 and the adjusting module 2, and the two modules may be set separately.For example, the state monitoring module 1 and the adjusting module 2are set at the network side equipment; or the state monitoring module 1is set at the network side equipment, and the adjusting module 2 is setat the user terminal side; or the state monitoring module 1 is set atthe network side equipment, and the adjusting module 2 is set both atthe network side equipment and the user terminal side.

The resource occupation rate may be determined according to the numberof accessing user terminals of the system. When the number of accessinguser terminals of the system is large, it is considered that the systemoccupation rate is high. When the number of accessing user terminals ofthe system is small, it is considered that the system occupation rate islow. Definitely, the resource occupation rate may be calculated in othermanners. This embodiment of the present invention is not limited herein.

It can be seen from the preceding embodiments that, in the embodimentsof the present invention, the resource occupation rate of thecommunication system is monitored, so as to facilitate a dynamicaladjustment to the dormancy timer. In this way, relatively longer of thedormancy timer may be set when the system occupation rate is low, so asto improve user terminal experience; and relatively shorter timethreshold of the dormancy timer may be set when the system occupationrate is high so as to provide a higher capacity and provide services formore user terminals. A preset corresponding relation may be classifiedinto two types: The time threshold is constant in each interval, or thetime threshold is changed with the change of the resource occupationrate in an interval or in all intervals. In the first manner, afrequency of the adjustment on the time threshold of the dormancy timermay be reduced, thus reducing the system overhead. In the second manner,the time threshold may be adjusted more accurately according to theresource occupation rate, so as to achieve accurate control. The presentinvention is applicable to all systems where dormancy timers areapplied.

All or a part of content of the technical solutions provided in thepreceding embodiments may be implemented by software programming, and asoftware program may be stored in readable storage media, such as a harddisk, an optical disk, or a floppy disk in a computer.

The preceding descriptions are merely exemplary embodiments of thepresent invention, but are not intended to limit the scope of thepresent invention. Any modification, equivalent replacement, orimprovement made without departing from the spirit and principle of thepresent invention shall fall within the protection scope of the presentinvention.

What is claimed is:
 1. A method for improving network resource occupancyin a communication system, comprising: obtaining, by a network sideequipment of the communication system, a resource occupation rate of thecommunication system; and setting, by the network side equipment, a timethreshold of a dormancy timer for a user terminal according to theresource occupation rate, wherein the dormancy timer starts when thereis no data transmission between the user terminal and the network sideequipment, and expires when it reaches the time threshold, and the timethreshold of the dormancy timer decreases as the resource occupationrate increases; and when the dormancy timer expires, releasing, by thenetwork side equipment, a connection with the user terminal.
 2. Themethod according to claim 1, wherein the time threshold corresponding tothe obtained resource occupation rate is set according to a relationbetween the resource occupation rate and the time threshold.
 3. Themethod according to claim 2, wherein the relation between the resourceoccupation rate and the time threshold is:${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{t\; 2} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix};} $ wherein, DORMANCY_TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 4. The method according to claim 2,wherein the relation between the resource occupation rate and the timethreshold is: ${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ \begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{{RES\_ OCUPY}/} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{{( {{{TH}\; 2} - {{TH}\; 1}} )*t\; 2} - {t\; 1}} & \; \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix} $ wherein, DORMANCY_(—) TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 5. The method according to claim 1, theobtaining the resource occupation rate of the communication systemcomprises: determining the resource occupation rate according to anumber of accessing user terminals in the communication system.
 6. Themethod according to claim 1, further comprising: sending, by the networkside equipment, a time threshold reset command to the user terminal withthe obtained resource occupation rate.
 7. The method according to claim6, further comprising: releasing, by the user terminal, the connectionbetween the user terminal and the network side equipment when thedormancy timer expires.
 8. A network side equipment of a communicationsystem, comprising a receiver, a transmitter, a processor and a memorystoring instructions executable by the processor, wherein the processoris configured to: obtain a resource occupation rate of the communicationsystem; set a time threshold of a dormancy timer for a user terminalaccording to the resource occupation rate, wherein the dormancy timerstarts when there is no data transmission between the user terminal andthe network side equipment, and expires when it reaches the timethreshold, and the time threshold of the dormancy timer decreases as theresource occupation rate increases; and when the dormancy timer expires,release a connection with the user terminal.
 9. The network sideequipment according to claim 8, wherein the time threshold correspondingto the obtained resource occupation rate is set according to a relationbetween the resource occupation rate and the time threshold.
 10. Thenetwork side equipment according to claim 9, wherein the relationbetween the resource occupation rate and the time threshold is:${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{t\; 2} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix};} $ wherein, DORMANCY_TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 11. The network side equipment accordingto claim 9, wherein the relation between the resource occupation rateand the time threshold is:${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{{RES\_ OCUPY}/} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{{( {{{TH}\; 2} - {{TH}\; 1}} )*t\; 2} - {t\; 1}} & \; \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $ wherein, DORMANCY_TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 12. The network side equipment accordingto claim 8, wherein the processor is configured to determine theresource occupation rate according to a number of accessing userterminals in the communication system.
 13. The network side equipmentaccording to claim 8, wherein the transmitter is configured to send atime threshold reset command to the user terminal which comprises theobtained resource occupation rate.
 14. The network side equipmentaccording to claim 8, wherein the network side equipment is a basestation.
 15. A user terminal in communication with a network sideequipment in a communication system, comprising: a receiver, configuredto receive from the network side equipment a time threshold resetcommand; and a processor, configured to set a time threshold of adormancy timer according to the time threshold reset command and releasea connection with the network side equipment when the dormancy timerexpires; wherein the dormancy timer starts when there is no datatransmission between the user terminal and the network side equipment,and expires when it reaches the time threshold; and wherein the timethreshold of the dormancy timer corresponds to a resource occupationrate of the communication system and decreases as the resourceoccupation rate increases.
 16. The user terminal according to claim 15,wherein the dormancy timer is reset when the user terminal begins datatransmission.
 17. The user terminal according to claim 15, wherein thetime threshold corresponding to the resource occupation rate is setaccording to a relation between the resource occupation rate and thetime threshold.
 18. The user terminal according to claim 17, wherein therelation between the resource occupation rate and the time threshold is:${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{t\; 2} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix};} $ wherein, DORMANCY_TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 19. The user terminal according to claim17, wherein the relation between the resource occupation rate and thetime threshold is:${{DORMANCY\_ TIMER}{\_ VALUE}} = \{ {\begin{matrix}{t\; 1} & {{RES\_ OCUPY} < {{TH}\; 1}} \\{{RES\_ OCUPY}/} & {{{TH}\; 1} \leq {RES\_ OCUPY} \leq {{TH}\; 2}} \\{{( {{{TH}\; 2} - {{TH}\; 1}} )*t\; 2} - {t\; 1}} & \; \\{t\; 3} & {{{TH}\; 2} < {RES\_ OCUPY}}\end{matrix},} $ wherein, DORMANCY_TIMER_VALUE is the timethreshold, RES_OCUPY is the resource occupation rate, TH1 is a firstthreshold of the resource occupation rate, TH2 is a second threshold ofthe resource occupation rate, and TH1<TH2; and t1 is a firstpredetermined value of the time threshold, t2 is a second predeterminedvalue of the time threshold, t3 is a third predetermined value of thetime threshold, and t1>t2>t3.
 20. The user terminal according to claim15, wherein the user terminal is a mobile terminal in communication witha wireless communication network.